I live in Milwaukee, WI and we have an indoor botanical garden called the Mitchell Park Conservancy Domes. It consists of 3 geodesic domes that can be visited practically year round. One is an ever-changing dome, meaning that there are always new displays to view. The other 2 domes are permanent exhibits; one with desert plants and one with tropical plants. In the desert dome, I was happily surprised to find several different Sans varieties growing. I have posted pictures for all to see. The first set is from the domes and is followed with pics some may have seen before. These are my personal plants which I hope I have correctly identified. Please let me know if I am wrong! Thanks everyone!

Here is a link that might be useful: Sansevieria plants